when I launch ff it just hangs forever showing white screen
I have to kill that last tab before ff snaps into action ... it make no matter what was
that last active tab prior to killing ff on launch it repeatedly shows just white screen

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I opened up around 50 tabs in a single firefox Private Window on Linux and all was good and fast, I then opened another URL in a new tab, which asked me to Stop or Wait… (閱讀更多)

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I opened up around 50 tabs in a single firefox Private Window on Linux and all was good and fast, I then opened another URL in a new tab, which asked me to Stop or Wait for unresponsive script running, where I chose to Stop. Then it started behaving abnormally; I was only able to do the following:

1 scroll on the tab using either middle mouse button or [Up] [Down] key on keyboard jfie
2 right click the tab content to open up right-click menu,
3 hover over the icons and change their background color like Homepage, Refresh, Page Actions, Show sidebars, as well as display their lables;

but I was not able to
$ trigger the proper response from above buttons, or
$ switch to another tab
$ close or create any tab

I noticed in journalctl logs around the time frame this happend, which showed the following:

NOTE that I did not open any gedit intentionally during that time window.
So far, I have not closed the unresponsive window, in hope that I would be able to restore those tabs. But I am not sure where to start. The $HOME/.mozilla/firefox director is about 100MB.

Could anyone help? I am willing to provide any more information and I am willing to invest my time on this.

I'm using NoScript to block all Javascript by default and sometimes I want to verify that blocking works by looking at the console (F12) output.

Normally, when I visit a website and NoScript blocks all Javascript ressources, the console (F12) should show me error messages that scripts failed to load.

However, on some sites (e.g. stackoverflow.com), when I open the console it is completely empty (no output at all) - although Javascript apparently has been blocked (NoScript tells me that it has blocked all scripts and stackoverflow.com displays that "stackoverflow is best viewed with Javascript enabled").

Interestingly, when I leave the console open and refresh that page, all the expected error messages about failed scripts are suddenly displayed in the console.

So my questions are:
1) what could be the reason that the expected error messages are only displayed when I refresh the page?
2) could this mean that at the time the console is empty, some scripts are executed? Although NoScript tells me it has blocked all of them and the main site apparently was loaded without Javascript?

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How does DNS over HTTPS modes define usage of hosts file?
Firefox: 69.0, OS: Ubuntu 18.04.3
I noticed that when I enable DNS over HTTPS ("network.trr.mode" set to 2 - us… (閱讀更多)

How does DNS over HTTPS modes define usage of hosts file?

Firefox: 69.0, OS: Ubuntu 18.04.3

I noticed that when I enable DNS over HTTPS ("network.trr.mode" set to 2 - use DoH, fall back to DNS), *and* hostname is defined in hosts file (/etc/hosts), Firefox usage of hosts file is inconsistent and hard to predict.

If IPs defined in hosts file and obtained via DNS request differ, corresponding site/resources behaves erratically, as if Firefox chooses at random, which page components' DNS address should be resolved via hosts, and which via DoH.

I had to disable DoH for that reason.

It is possible to set up DoH, so that it used hosts records, if present, and used DNS in all other cases?

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I am trying to remove the some default search engines from Firefox. I can remove them in settings yet if I type @ then a number of search engines I don't want including B… (閱讀更多)

I am trying to remove the some default search engines from Firefox. I can remove them in settings yet if I type @ then a number of search engines I don't want including Bing Google and Amazon are still there. I think I have found the json that makes them visible: